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Bulldozer D155-1 D155-6 Replacement Idler 17A-30-00162 17A-30-00161 Front Idler Rear Idler. Customized Undercarriage Solutions: Over 30 customized designs available for diverse global needs. High Wear Resistance Materials: Hot rolled rim with boron steel grade and sophisticated heat treatment. Comprehensive Quality Control: Strict testing system covering raw materials, manufacturing, and delivery. Wide Equipment Compatibility: Supports excavators, bulldozers, and drilling rigs from 0.8t to 800t. OEM and ODM Services: Full customization available for color, finish, and technical specs. Video Technical Support: Free spare parts and online support provided for after-sales service.